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ATI Radeon HD 4855
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ATI Radeon HD 4855
This is a GPU manufactured with TSMC 55nm process, based on ATI TeraScale architecture and released on Jan 2010. It features 0.956 billion transistors, 8 Rendering cores and 512MB GDDR5 memory, with 256KB L2 cache, theoretical performance of 736.0GFLOPS, with total power consumption of 110W.
Graphics Card
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Release Date
Jan 2010
Generation
Radeon R700
Type
Desktop
Bus Interface
PCIe 2.0 x16
Clock Speeds
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Memory Clock
900 MHz
Memory
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Memory Size
512MB
Memory Type
GDDR5
Memory Bus
256bit
Bandwidth
115.2GB/s
Render Config
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Compute Units
8
Shading Units
640
TMUs
32
ROPs
16
L1 Cache
16 KB (per CU)
L2 Cache
256 KB
Theoretical Performance
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Pixel Rate
9.200 GPixel/s
Texture Rate
18.40 GTexel/s
FP32 (float)
736.0 GFLOPS
FP64 (double)
147.2 GFLOPS
Graphics Processor
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GPU Name
RV770
GPU Variant
RV770 PRO
(215-0669065)
(215-0669065)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
0.956 billion
Die Size
256 mm²
Board Design
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TDP
110W
Suggested PSU
300 W
Outputs
1x DVI
1x HDMI 1.3a
1x VGA
1x HDMI 1.3a
1x VGA
Power Connectors
1x 6-pin
Graphics Features
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DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1
Rankings
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FP32 (float)
